
public class StringBufferDemo{
  public static void main(String [] args){
              StringBuffer buffer = new StringBuffer();
               buffer.append('S');
               buffer.append("tringBuffer");
             System.out.println(buffer.charAt(1));
              System.out.println(buffer.capacity());
             System.out.println(buffer.indexOf("tring12345"));
              System.out.println("buffer = " + buffer.toString());
             System.out.println(buffer.length());
          }
}
